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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '27d225801751e52a117c42f06499675d75c538da304222c00d452cec7c544e67' 
  AND token = '8IQY+IfV0+Q9F/kvYUjX9a120ZyQL22rpokoxGoBd74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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