Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7461d899a7ac404d1e504eedcbdd9b97f40af78a4c2d20b995d5fb4e02de15dd' 
  AND token = 'NQxuMRHkHrSymtkIjfRfNV5yy2DTl3d+w6aDgD2UlNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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