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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41913d710ae44d263a783bb3a8a7154e4c7c6fbdeacfbd74a765dcadb8abe8c1' 
  AND token = 'GR04FApC2CtasW2QNWFBR9Rlu9SWbL2yicGF7pyNzFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}