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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f9df33504949029aac5423f0a63e897bda66d21f6b3618584d1c77ca495590d' 
  AND token = 'cJfB94KE4e84IWEG3tzDeL4zyVT+EI8D0fmNZe3ScBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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