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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0afad2b5bb4498fdb7dfd2d3332d4e22dc57a2dd5d32b4a5e69ac79563e23ad1' 
  AND token = 'so658cHRAViBce5ceXuPrdaYC9YjB/BwVpX25wFocko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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