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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c2c91d521b44f156053482ef3b477dfa5e46048af1126ed0b5c96af779dbe93' 
  AND token = 'khiZod60tKx0cpPLkHf/OD+7SsPwF3NT/gsP1CElcQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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