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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04444738505214bc72fcf02982c6012c07b2d4ae2a051bf3a11ada6ae6fb4572' 
  AND token = 'M3P6t/8RFDn59HG+lMeGhOdLzyKQrQO8bayeQPiikJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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