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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '87c44a0ce38231c520e3813ae9784d1d8b032d2c0726045e914a8d5a466ee324' 
  AND token = 'v7pi9fjI3tTQsVA18O7NpvVuhw0FPO0YFlOfwPNNF6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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