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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd0d072a6ea64c9c486d625c3e1a2756d894407b20563ceb4cb3ff172864c7a9' 
  AND token = 'eV+KTDH5j6VDna7urTDep1IOuQRa25rv2tWztm2oOm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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