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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a41421cefaa021119d6254a7dcc8c987f743f63417b8bd4f8320a6a8c7e8d6e' 
  AND token = 'Qp88JqDWMYTPFFEl4WkJ4zbSsiabqi+ElIib0fVY3+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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