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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec80d390377bd3d8abf1a487888b2417bf2228bcbb9fe9f6cc86a9cc1a5ffa92' 
  AND token = '/cqkO30GZjacwCk2xzOfaDFz8beqODbC9hkPd8s5hgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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