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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59fb97471fa8485d1a41207668177b2d4bffa332d28215e5c892627db34916df' 
  AND token = 'DerfBW2bXK+CnAFUFJL78XLJmdPIOteh+Wis1p1l2Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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