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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b06dc9bc3e67289e0d108e2c8baa151294b89108eb24f3248787edd0a29f4950' 
  AND token = 'sRD7JsRrUGJ57tpxlGbxw4qkwac0IhQZB53KDX+p0NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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