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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4150d0c5225edc05f51c1268c62b31ca2fe5130730d93519d486b74b6061fc17' 
  AND token = 'dtYclDkFL2yK4IjpMbANQ7UXKNxE76nDGvqjd8N4Nxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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