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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8960c3c2890b8fcab88c2d65370921c0e9e305471dd30c8d050548b891e5bc7' 
  AND token = 'eyvaLRvcuFGRF7kwjJ4NrPzRrWCTVmyMvZWhuIgjRj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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