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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '097b905a3f752dd3c4f6631afc0eb28ae2b45fdd757f6788ca454560303391b0' 
  AND token = 'i09Bf29DLPOkY0x7P9cTSBGS/N48XMcG9M2/mQW9JjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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