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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '084acb74f4ecb5957ddf581b66edadd5e4bda514bf89e579717b68c754c48b2f' 
  AND token = 'AMpCJU1RxLu1hdZtaIyqIQJMqTzvsSKZyDRZk7tRNCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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