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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1a6ac216edc279c1ac4ceeb07d3dd4fff2f843ab6ca9ad9463be3020ae0cb6e' 
  AND token = 'qUdTNks8gyzWQjrr0I34ZuSaMjYqtfmo8Shd8XQiwj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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