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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89056822ef15d87ebee43870c7ac77c289aeae125c0678e07e3a46756f8e41f1' 
  AND token = 'a5nkrdZT2W8SfnUosVSM2HUQZWUfzGAI1CER3XwZU9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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