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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bb4d9504d2300fe9ae6705e77c4e01afb7f6dba144f9ce6f861b7bae3c5ce1d' 
  AND token = 'qbU1JhgeHKVE4J4TEE/I4eai542A7agBoVWwmZtTtto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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