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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9fe452fa4b2474340069577e03fe20bea2bee5f44acb5b9d1626e88b7e09a6ff' 
  AND token = '6NTRP9PtDXYUed7iyGzt4qit3W/dBsLM9NPC8dmbh60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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