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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49f3c96965fd9c5668d3a3fb4e0af955adbbbb9411918c29b6f766d71aa4e9e5' 
  AND token = 'z2MhTu1QrQcoPllQb8/ldQK1R2NJkl0P5X/fTQGClHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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