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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec58b87d6d0616b74bd5a01320eaba3989b813c769a41ad93fc8a113882b0a40' 
  AND token = 'hsO60Qo7Q6+3pqgYdq6xG7dl7rpQ6fExloEYxWs0pVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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