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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a82088c6bb6cc967ffe197e4f7a557e46b3850c005ed2df20b3679acf879926' 
  AND token = 'qA+YBV5AvB93UJU5T1H3cD2SMlV52ypofi1+zm5T90M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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