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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9bdacdca14dce17eee939b03efdf47191b932e59ca19de90ef6ca9f6251951d1' 
  AND token = 'CoFL+2I6ERvfEmfsNZdeXmGMO5Xk8buhCoBAtt7bx3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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