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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60a08fb71dd9dca39a3e189e800c67a190e185d3a86b204c7513d4819ef6cc2b' 
  AND token = '95g6Djq2Ufj8HyF4EUaxdwZjklT8xWMMQG7VuDN9TAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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