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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5aedcabb2b4d8f66bb16c4d2352bdf0825f31eacdf9b111163b10066c3ef8f20' 
  AND token = '1AsVutz6pBBfz9BYSqGcm2nXJV2jrvh17zx7Vc00u6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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