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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7665d7e5b2eb0ff5c29ae31f67f87ad1da748a779f4c2fa78c27b37944e7e116' 
  AND token = 'EF+llY9bmZPyduM7slZwQVrcgPTEfz6TybOFj9be7cE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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