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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f934d13d24a1c63595be77ae0d1164a3f588880aa33eee67f1b41917787d2362' 
  AND token = 'NnKrrqlIs0DEbg0COJptUf/Q1TF9t30vPbr0RlN/qNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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