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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edb9f647c20d6bcb5049f7027ccbc4536fb56da5b275aa9cced78d2cb4ee92e8' 
  AND token = 'ahESTtqlaYtrrZWKHUsF9M5KS7AIviQfDdwywZ4l3io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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