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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1bef811acb61a841bb5dabe93e158a26cfa09de82f81628b62d7dc6484ca20c' 
  AND token = 'LZP4eESS06jKYCl0WYC5YsLpD0j0yKPL/eYg2srbU9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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