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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e667f02158fa2b1b84556e8b72cabb0fecf62959db9e1576e13505079fdfa2d' 
  AND token = 'pA7fYf7l9A1aVcu99ebpJNbh1SqOrmr94B7WdItQ3LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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