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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2093de7763930478d4b802226af637f59c43240b64057af33fdb3f91f84bd4bf' 
  AND token = 'g3AEl92GwOvJHi7BOmOdkwgmWA7f5Y/bFKfAII6a190=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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