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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4e25bf66483021d62faa1f5cdc4d2e9694b53dc6c3e61501b10b1724f027089' 
  AND token = 'V74YylOQiuR4U5li2JbZY89/e4H6PgaOFF42HgfrKUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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