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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed65f08a924e7535b27801d2d2ed92ef5f2f2fd0574e767251732914b4dfcc8c' 
  AND token = 'yocbs5KBmVNwVIPxH7E2cWVG75XZRTcxA9NdNC0yc3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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