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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cf6a2062f04e05ee69ad3ef7ecada5ef5c6ac4f032bb9d0fd3bb8033d3e606b' 
  AND token = 'eALL05laMdQ+6+bqD8PuBpLbK71GALDi1XgzIoW/uTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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