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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cd95d5caa4d936d997424bc6612bb06813431dabb8380420befdb3d7a196f59' 
  AND token = 'd6hsUj9iCNR/oZvn/lR/5q00hTVyVEfZ2IkfVqB5gLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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