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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ca35c0717b0b2da0776b93131c1b88a4bc32066f61649f75ee75f88467485ca' 
  AND token = 'eb026R5nl6er3l8H0RYUQXvaYUrbAMrWRWKrfI6M3m0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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