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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ab7f8db3fa734538b44b0fa0457569391ebe219edef3ddaad23e02ca4b5be4' 
  AND token = 'H1ICUekQEIyWrkisbZtpfUPnPv/X4RO0MJl4of++srk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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