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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7099b2dcfd10b25e9ea8dbd997b6ebba5085b0bb8e5e3c97709f72e640fe54d' 
  AND token = 'BA24uQ8JJtQAYP4DnoIN8AU+buVqHLxU+F2H4WbuJWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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