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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d7977c3ae591508bbe43d047828ef67a9f7fbd0fbb379bf140639b5f0234f53' 
  AND token = 'ILkxE5JYIi3rMepGxZa9BEbvbOTSr0VB8PQYgyWJn3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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