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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd25b4f85f5bd8ff5781dbc97cd00b9205d45ab001cbfe5a1db8680ba36cae7c9' 
  AND token = 'wXSJvFTWsk7kI/G2yIcGnKMpWpr6Tkjx6TbYBrav55g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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