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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e830accbbacea5d90f32a1fe2e178ce90977b30921f0f6328d81a9777a907eb' 
  AND token = 'sCnz1iyRGg6N2B5bCoe3ce/9U8Dxh0MJs/4SVsPMshU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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