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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee14f7aa58895594c7cf70c8dbe7e54641f4084cc332d7f547c3e511a86a4a5b' 
  AND token = 'GAkz2oU9OCrv/vfJb8j0uOOoRMXQg66/gf+YFcQRD/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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