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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01adbe69af5e8dcbd2f4f7f53167014b43c2b47bbffe04d907fb83d40748d877' 
  AND token = '9Kgu4xlRerj2dRRJxTjMpsTC5vpQpUBl1g5qbMo8xvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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