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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf107be81cfc231da16427ab81ea19692a7550a1b420f7caa3bf232a741af4e1' 
  AND token = 'lZMpI2VC2udAn8WPryFpJHCZ17grtPwO74+B8Sr1t5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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