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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2507c7d52efc62e8b7277aeaf55b3a922b1db5457a74c7a98cfaf1a3ed9c6f05' 
  AND token = 'TP7e3to/GFr5zrDJni+n46+2hQlJpVODTmA/Wj2rpsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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