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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d611022c4de6bb30b8b71e703245650bef7b32129f80ccf5f359ec29d054c4b' 
  AND token = 'CPC1VRqPkQruPa3T9M2Eq3D+E/hP3onTHg+cq6D334A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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