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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86b05c66043717acd444143fabe6eb3732a99985091389d7bffb8f61ee84abab' 
  AND token = 'YU32O6PFjsWQesAcu5zfbPeeUROIs1NCMqJWd2xzB5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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