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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22699df516ea90f07537291c7007bb777bce2b2882b5e3c8bfedb60be07c2a23' 
  AND token = 'RevYBdvP8gy3HnHJWS17wWGQ7fBgGWuudLpkxQPxyQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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