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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '367a7f0133d731360fbee20901d5277eb10244876fa669da454c4ae7cb7ad61d' 
  AND token = 'AQMdDUgOBXmSW1t5VQbT+bdoJPK57LxinS2VcYrukQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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