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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c70b8a9baadcc3a6ea4a7f11ed79dfe21f25ca9c5707c133a06b7fa4ad7f47b9' 
  AND token = 'n+ddWJZRh+rhV4FNyTNpXuo8FkoFGr9J4KC15TtG2h4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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