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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '567eb3b2c1c411b4a0567603be97b51a3b8c4777526bc3d1e7ea9fb2288facb8' 
  AND token = 'ZwKmIpkYxGtbec0p05tjYnuV7am434nNy60AI1KAyB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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