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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69f2d9de772427ed002d41ec5e9491c063cddf8f08516d3a610ce27085a0cd89' 
  AND token = 'BD/nesilwdxDqR+PKEXQCXp49Dbg/W1x94VQO/yVwaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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