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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0173fbce1d858c71122a777df284d368ece8c14fab5b8e119437aa7099815c89' 
  AND token = 'ZAC0S+RIFZA2f2jflk7h1/gsxyk4B4xLlZ/cquJzY+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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