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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1dd70ddca88fdcfc07e0ae7bd49c434736236f2f59446e1d67d2b462dcbcf011' 
  AND token = 'Uo+h/Jlf1UVb2+FuF4mlqk0vbwH2TFWn7f/BaIx5o5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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