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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9062fec3ace30dd47ed452263a92d3459ea1651e3de7f9577a93c6d146c0e659' 
  AND token = 'VG8Fea6kN0xZPACD8lIxyU0FDFr15kOdIkXtQ76W91U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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