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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a460f06db06c5aea4e4b0a59195045d61d3d58ff7e1a4023207afe1ccc8f644' 
  AND token = 'ORilwcCMYIbUN5+esaZxRYoDOheeT+NHWI6Rd5Hb1CE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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