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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a127a77bab3ef11c4b654dd2e0cc1bec460dc9a4acbfc971ae63076acaa1209' 
  AND token = 'NtV+MfEwtgmlT2B/OW/MWOf7Y4u3JvVP3oFygBtvFFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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