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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06f8bea2a5c2002e482f7c5b8789773d63fa76302908142374ef539e2c0534d5' 
  AND token = 'ARSyr0kIjrIWHBq4olxZ2V5W070NQPcSBzzchGpcKa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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