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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00e0816e8214d2952e903d12b3c43edcff53c638f2d5e5acfe46c8f9e4d2525d' 
  AND token = 'GUg5IUH/0NiYJDr/oY1fMLp9g4qUp1DNT67HYJPw4Q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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